hi guys , i have a 2010 wrx sti uk with a forged engine which i had to have the head gaskets done recently as one had failed into cylinder 3. anyway the work was done by a very reputable motorsport company and since ive had it all fitted back together when the engine gets warm if i give it some pedal when i pull up at lights i get a oil smell coming through heater ? i had the egr and tgv's deleted, decatted, fitted a cosworth intake. there are no oil leaks , turbo seems fine no oil from exhaust on boost . im running car oil level between half and three quarters because if i fill right to max it seems to smell worse . could it be something to do with engine venting ? thanx